Home / 2,139.02-3,206.67-841.40

Finding the Fourth Proportional to 2,139.02, 3,206.67 and 841.40

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Solution

The fourth proportional to 2,139.02, 3,206.67 and 841.40 is: 1,261.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.02 : 3,206.67 = 841.40 : x
  2. Step 2: Convert to fraction form
    2,139.02/3,206.67 = 841.40/x
  3. Step 3: Cross multiply
    2,139.02x = 3,206.67 × 841.40
  4. Step 4: Simplify right side
    2,139.02x = 2,698,092.14
  5. Step 5: Solve for x
    x = 2,698,092.14/2,139.02
  6. Step 6: Final answer
    x = 1,261.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.